publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
2011-02-24 | Environment-assisted quantum Minority games | The effect of entanglement and correlated noise in a four-player quantum
Minority game is investigated. Different time correlated quantum memory
channels are considered to analyze the Nash equilibrium payoff of the 1st
player. It is seen that the Nash equilibrium payoff is substantially enhanced
due to the presence of ... | 1102.5056v2 |
2011-03-17 | Viscous damping of r-modes: Large amplitude saturation | We analyze the viscous damping of r-mode oscillations of compact stars,
taking into account non-linear viscous effects in the large-amplitude regime.
The qualitatively different cases of hadronic stars, strange quark stars, and
hybrid stars are studied. We calculate the viscous damping times of r-modes,
obtaining numer... | 1103.3521v2 |
2011-05-01 | Viscous damping of nanobeam resonators: humidity, thermal noise and the paddling effect | The nanobeam resonator is the key mechanical component in the
nano-electromechanical system. In addition to its high frequency originating
from its low dimension, the performance is significantly influenced by the
circumstances, especially at nanoscale where a large surface area of the
material is exposed. Molecular dy... | 1105.0139v1 |
2011-06-07 | Damping by branching: a bioinspiration from trees | Man-made slender structures are known to be sensitive to high levels of
vibration, due to their flexibility, which often cause irreversible damage. In
nature, trees repeatedly endure large amplitudes of motion, mostly caused by
strong climatic events, yet with minor or no damage in most cases. A new
damping mechanism i... | 1106.1283v1 |
2011-11-29 | Dispersion and damping of potential surface waves in a degenerate plasma | Potential (electrostatic) surface waves in plasma half-space with degenerate
electrons are studied using the quasi-classical mean-field kinetic model. The
wave spectrum and the collisionless damping rate are obtained numerically for a
wide range of wavelengths. In the limit of long wavelengths, the wave frequency
$\ome... | 1111.6723v1 |
2012-01-29 | Smooth attractors of finite dimension for von Karman evolutions with nonlinear frictional damping localized in a boundary layer | In this paper dynamic von Karman equations with localized interior damping
supported in a boundary collar are considered. Hadamard well-posedness for von
Karman plates with various types of nonlinear damping are well-known, and the
long-time behavior of nonlinear plates has been a topic of recent interest.
Since the vo... | 1201.6072v1 |
2012-06-15 | Landau Damping in a Turbulent Setting | To address the problem of Landau damping in kinetic turbulence, the forcing
of the linearized Vlasov equation by a stationary random source is considered.
It is found that the time-asymptotic density response is dominated by resonant
particle interactions that are synchronized with the source. The energy
consumption of... | 1206.3415v4 |
2013-10-29 | Influence of sample geometry on inductive damping measurement methods | We study the precession frequency and effective damping of patterned
permalloy thin films of different geometry using integrated inductive test
structures. The test structures consist of coplanar wave guides fabricated onto
patterned permalloy stripes of different geometry. The width, length and
position of the permall... | 1310.7817v1 |
2014-04-02 | Determination of the cross-field density structuring in coronal waveguides using the damping of transverse waves | Time and spatial damping of transverse magnetohydrodynamic (MHD) kink
oscillations is a source of information on the cross-field variation of the
plasma density in coronal waveguides. We show that a probabilistic approach to
the problem of determining the density structuring from the observed damping of
transverse osci... | 1404.0584v1 |
2014-04-14 | Distributed Approximate Message Passing for Compressed Sensing | In this paper, an efficient distributed approach for implementing the
approximate message passing (AMP) algorithm, named distributed AMP (DAMP), is
developed for compressed sensing (CS) recovery in sensor networks with the
sparsity K unknown. In the proposed DAMP, distributed sensors do not have to
use or know the enti... | 1404.3766v2 |
2014-12-17 | The most metal-rich damped Lyman alpha systems at z>1.5 I: The Data | We present HIRES observations for 30 damped Lyman alpha systems, selected on
the basis of their large metal column densities from previous, lower resolution
data. The measured metal column densities for Fe, Zn, S, Si, Cr, Mn, and Ni are
provided for these 30 systems. Combined with previously observed large metal
column... | 1412.5491v1 |
2015-03-26 | Transient nutations decay in diluted paramagnetic solids: a radiation damping mechanism | Here, a theory of the intensity and concentration dependent damping of
nutation signals observed by Boscaino et al. (Phys. Rev B 48, 7077 (1993);
Phys. Rev. A 59, 4087 (1999)) and by others in various two-level spin systems
is proposed. It is shown that in diluted paramagnetic solids contribution of
dipole-dipole inter... | 1503.07641v2 |
2015-08-17 | Increased magnetic damping of a single domain wall and adjacent magnetic domains detected by spin torque diode in a nanostripe | We use spin-torque resonance to probe simultaneously and separately the
dynamics of a magnetic domain wall and of magnetic domains in a nanostripe
magnetic tunnel junction. Thanks to the large associated resistance variations
we are able to analyze quantitatively the resonant properties of these single
nanoscale magnet... | 1508.04043v1 |
2016-04-27 | Influence of nonlocal damping on the field-driven domain wall motion | We derive the complete expression of nonlocal damping in noncollinear
magnetization due to the nonuniform spin current pumped by precessional
magnetization and incorporate it into a generalized Thiele equation to study
its effects on the dynamics of the transverse and vortex domain walls (DWs) in
ferromagnetic nanowire... | 1604.07971v2 |
2016-04-27 | Damping of the Collective Amplitude Mode in Superconductors with Strong Electron-Phonon Coupling | We study the effect of strong electron-phonon interactions on the damping of
the Higgs amplitude mode in superconductors by means of non-equilibrium
dynamical mean-field simulations of the Holstein model. In contrast to the BCS
dynamics, we find that the damping of the Higgs mode strongly depends on the
temperature, be... | 1604.08073v2 |
2016-12-16 | Dynamics of cohering and decohering power under Markovian channels | In this paper, we investigate the cohering and decohering power for the
one-qubit Markovian channels with respect to coherence in terms of the
$l_{1}$-norm, the R$\acute{e}$nyi $\alpha$-relative entropy and the Tsallis
$\alpha$-relative entropy. In the case of $\alpha=2$, the cohering and
decohering power of the amplit... | 1612.05355v1 |
2017-01-19 | Decoherence effects on multiplayer cooperative quantum games | We study the behavior of cooperative multiplayer quantum games [35,36] in the
presence of decoherence using different quantum channels such as amplitude
damping, depolarizing and phase damping. It is seen that the outcomes of the
games for the two damping channels with maximum values of decoherence reduce to
same value... | 1701.05342v1 |
2017-07-30 | Blow-up for semilinear damped wave equations with sub-Strauss exponent in the scattering case | It is well-known that the critical exponent for semilinear damped wave
equations is Fujita exponent when the damping is effective. Lai, Takamura and
Wakasa in 2017 have obtained a blow-up result not only for super-Fujita
exponent but also for the one closely related to Strauss exponent when the
damping is scaling invar... | 1707.09583v3 |
2017-10-09 | Resonant absorption of surface sausage and surface kink modes under photospheric conditions | We study the effect of resonant absorption of surface sausage and surface
kink modes under photospheric conditions where the slow surface sausage modes
undergo resonant damping in the slow continuum and the surface kink modes in
the slow and Alfv\'{e}n continua at the transitional layers. We use recently
derived analyt... | 1710.03350v2 |
2017-11-21 | Nonexistence of global solutions of nonlinear wave equations with weak time-dependent damping related to Glassey conjecture | This work is devoted to the nonexistence of global-in-time energy solutions
of nonlinear wave equation of derivative type with weak time-dependent damping
in the scattering and scale invariant range. By introducing some multipliers to
absorb the damping term, we succeed in establishing the same upper bound of the
lifes... | 1711.07591v2 |
2018-01-03 | Stabilisation of wave equations on the torus with rough dampings | For the damped wave equation on a compact manifold with {\em continuous}
dampings, the geometric control condition is necessary and sufficient for
{uniform} stabilisation. In this article, on the two dimensional torus, in the
special case where $a(x) = \sum\_{j=1}^N a\_j 1\_{x\in R\_j}$ ($R\_j$ are
polygons), we give a... | 1801.00983v2 |
2018-03-12 | Optical Rotation of Levitated Spheres in High Vacuum | A circularly polarized laser beam is used to levitate and control the
rotation of microspheres in high vacuum. At low pressure, rotation frequencies
as high as 6 MHz are observed for birefringent vaterite spheres, limited by
centrifugal stresses. Due to the extremely low damping in high vacuum,
controlled optical rotat... | 1803.04297v1 |
2018-03-23 | A conservation law with spatially localized sublinear damping | We consider a general conservation law on the circle, in the presence of a
sublinear damping. If the damping acts on the whole circle, then the solution
becomes identically zero in finite time, following the same mechanism as the
corresponding ordinary differential equation. When the damping acts only
locally in space,... | 1803.08767v1 |
2019-03-06 | Microwave magnon damping in YIG films at millikelvin temperatures | Magnon systems used in quantum devices require low damping if coherence is to
be maintained. The ferrimagnetic electrical insulator yttrium iron garnet (YIG)
has low magnon damping at room temperature and is a strong candidate to host
microwave magnon excitations in future quantum devices. Monocrystalline YIG
films are... | 1903.02527v3 |
2020-05-15 | Slow magnetosonic wave absorption by pressure induced ionization-recombination dissipation | A new mechanisms for damping of slow magnetosonic waves (SMW) by pressure
induced oscillations of the ionization degree is proposed. An explicit formula
for the damping rate is quantitatively derived. Physical conditions where the
new mechanism will dominate are briefly discussed. The ionization-recombination
damping i... | 2005.07730v1 |
2020-07-02 | Uniformly-Damped Binomial Filters: Five-percent Maximum Overshoot Optimal Response Design | In this paper, the five-percent maximum overshoot design of uniformly-damped
binomial filters (transfer-functions) is introduced. First, the butterworth
filter response is represented as a damped-binomial filter response. To extend
the maximum-overshoot response of the second-order butterworth to higher
orders, the bin... | 2007.00890v3 |
2020-09-17 | Temperature Dependent Non-linear Damping in Palladium Nano-mechanical Resonators | Advances in nano-fabrication techniques has made it feasible to observe
damping phenomena beyond the linear regime in nano-mechanical systems. In this
work, we report cubic non-linear damping in palladium nano-mechanical
resonators. Nano-scale palladium beams exposed to a $H_2$ atmosphere become
softer and display enha... | 2009.08324v1 |
2020-12-25 | Information constraint in open quantum systems | We propose an effect called information constraint which is characterized by
the existence of different decay rates of signal strengths propagating along
opposite directions. It is an intrinsic property of a type of open quantum
system, which does not rely on boundary conditions. We define the value of
information cons... | 2012.13583v3 |
2021-04-29 | Non-linear damping of standing kink waves computed with Elsasser variables | In a previous paper, we computed the energy density and the non-linear energy
cascade rate for transverse kink waves using Elsasser variables. In this paper,
we focus on the standing kink waves, which are impulsively excited in coronal
loops by external perturbations. We present an analytical calculation to
compute the... | 2104.14331v1 |
2021-05-31 | Revisiting the Plasmon Radiation Damping of Gold Nanorods | Noble metal nanoparticles have been utilized for a vast amount of optical
applications. For the applications that used metal nanoparticles as nanosensors
and optical labeling, larger radiation damping is preferred (higher optical
signal). To get a deeper knowledge about the radiation damping of noble metal
nanoparticle... | 2105.14873v1 |
2021-06-23 | Bayesian evidence for a nonlinear damping model for coronal loop oscillations | Recent observational and theoretical studies indicate that the damping of
solar coronal loop oscillations depends on the oscillation amplitude. We
consider two mechanisms, linear resonant absorption and a nonlinear damping
model. We confront theoretical predictions from these models with observed data
in the plane of o... | 2106.12243v1 |
2021-07-13 | Convergence of iterates for first-order optimization algorithms with inertia and Hessian driven damping | In a Hilbert space setting, for convex optimization, we show the convergence
of the iterates to optimal solutions for a class of accelerated first-order
algorithms. They can be interpreted as discrete temporal versions of an
inertial dynamic involving both viscous damping and Hessian-driven damping. The
asymptotically ... | 2107.05943v1 |
2021-12-13 | Effect of interfacial damping on high-frequency surface wave resonance on a nanostrip-bonded substrate | Since surface acoustic waves (SAW) are often generated on substrates to which
nanostrips are periodically attached, it is very important to consider the
effect of interface between the deposited strip and the substrate surface,
which is an unavoidable issue in manufacturing. In this paper, we propose a
theoretical mode... | 2112.06367v1 |
2022-09-13 | Latest results from the DAMPE space mission | The DArk Matter Particle Explorer (DAMPE) is a space-based particle detector
launched on December 17th, 2015 from the Jiuquan Satellite Launch Center
(China). The main goals of the DAMPE mission are the study of galactic cosmic
rays (CR), the electron-positron energy spectrum, gamma-ray astronomy, and
indirect dark mat... | 2209.06014v1 |
2022-10-25 | Microscopic structure of electromagnetic whistler wave damping by kinetic mechanisms in hot magnetized Vlasov plasmas | The kinetic damping mechanism of low frequency transverse perturbations
propagating parallel to the magnetic field in a magnetized warm electron plasma
is simulated by means of electromagnetic (EM) Vlasov simulations. The
short-time-scale damping of the electron magnetohydrodynamic whistler
perturbations and underlying... | 2210.13764v1 |
2023-01-13 | An artificially-damped Fourier method for dispersive evolution equations | Computing solutions to partial differential equations using the fast Fourier
transform can lead to unwanted oscillatory behavior. Due to the periodic nature
of the discrete Fourier transform, waves that leave the computational domain on
one side reappear on the other and for dispersive equations these are typically
hig... | 2301.05789v1 |
2023-03-07 | Stabilization of the wave equation on larger-dimension tori with rough dampings | This paper deals with uniform stabilization of the damped wave equation. When
the manifold is compact and the damping is continuous, the geometric control
condition is known to be necessary and sufficient. In the case where the
damping is a sum of characteristic functions of polygons on a two-dimensional
torus, a resul... | 2303.03733v4 |
2023-07-10 | The Characteristic Shape of Damping Wings During Reionization | Spectroscopic analysis of Ly$\alpha$ damping wings of bright sources at $z>6$
is a promising way to measure the reionization history of the universe.
However, the theoretical interpretation of the damping wings is challenging due
to the inhomogeneous nature of the reionization process and the proximity
effect of bright... | 2307.04797v1 |
2023-07-17 | Dissipation in solids under oscillatory shear: Role of damping scheme and sample thickness | We study dissipation as a function of sample thickness in solids under global
oscillatory shear applied to the top layer of the sample. Two types of damping
mechanism are considered: Langevin and Dissipative Particle Dynamics (DPD). In
the regime of low driving frequency, and under strain-controlled conditions, we
obse... | 2307.08413v1 |
2023-08-17 | A low-rank algorithm for strongly damped wave equations with visco-elastic damping and mass terms | Damped wave equations have been used in many real-world fields. In this
paper, we study a low-rank solution of the strongly damped wave equation with
the damping term, visco-elastic damping term and mass term. Firstly, a
second-order finite difference method is employed for spatial discretization.
Then, we receive a se... | 2308.08888v2 |
2023-10-30 | Optimal backward uniqueness and polynomial stability of second order equations with unbounded damping | For general second order evolution equations, we prove an optimal condition
on the degree of unboundedness of the damping, that rules out finite-time
extinction. We show that control estimates give energy decay rates that
explicitly depend on the degree of unboundedness, and establish a dilation
method to turn existing... | 2310.19911v1 |
2024-03-12 | Modulational instability of nonuniformly damped, broad-banded waves: applications to waves in sea-ice | This paper sets out to explore the modulational (or Benjamin-Feir)
instability of a monochromatic wave propagating in the presence of damping such
as that induced by sea-ice on the ocean surface. The fundamental wave motion is
modelled using the spatial Zakharov equation, to which either uniform or
non-uniform (frequen... | 2403.07425v1 |
1994-05-12 | Black Hole Relics and Inflation: Limits on Blue Perturbation Spectra | Blue primordial power spectra have spectral index $n>1$ and arise naturally
in the recently proposed hybrid inflationary scenario. An observational upper
limit on {\em n} is derived by normalizing the spectrum at the quadrupole scale
and considering the possible overproduction of Planck mass relics formed in the
final ... | 9405027v1 |
1995-02-01 | Spectra and Statistics of Cosmic String Perturbations on the Microwave Background: A Monte Carlo Approach | Using Monte Carlo simulations of perturbations induced by cosmic strings on
the microwave background, we demonstrate the scale invariance of string
fluctuation patterns. By comparing string-induced fluctuation patterns with
gaussian random phase ones, we show that the non-gaussian signatures of the
string patterns are ... | 9502004v2 |
1999-04-16 | The Sunyaev-Zeldovich Effect as Microwave Foreground and Probe of Cosmology | The Sunyaev-Zel'dovich (SZ) effect from clusters of galaxies should yield a
significant signal in cosmic microwave background(CMB) experiments at small
angular scales ($\ell \ga 1000$). Experiments with sufficient frequency
coverage should be able to remove much of this signal in order to recover the
primary anisotropy... | 9904220v1 |
2000-12-05 | Near-IR Spectroscopy and Population Synthesis of Super Star Clusters in NGC 1569 | We present H- and K-band NIRSPEC spectroscopy of super star clusters (SSCs)
in the irregular starburst galaxy NGC 1569, obtained at the Keck Observatory.
We fit these photospheric spectra to NextGen model atmospheres to obtain
effective spectral types of clusters, and find that the information in both H-
and K-band spe... | 0012089v1 |
2001-05-14 | Understanding Cluster Gas Evolution and Fine-Scale CMB Anisotropy with Deep Sunyaev-Zel'dovich Effect Surveys | We investigate the impact of gas evolution on the expected yields from deep
Sunyaev-Zel'dovich (SZ) effect surveys as well as on the expected SZ effect
contribution to fine scale anisotropy in the Cosmic Microwave Background. The
approximate yields from SZ effect surveys are remarkably insensitive to gas
evolution, eve... | 0105229v1 |
2001-05-22 | Constraints on Omega_m, Omega_L, and Sigma_8, from Galaxy Cluster Redshift Distributions | We show that the counts of galaxy clusters in future deep cluster surveys can
place strong constraints on the matter density, Omega_m, the vacuum energy
density, Omega_L, and the normalization of the matter power spectrum, sigma_8.
Degeneracies between these parameters are different from those in studies of
either high... | 0105396v2 |
2002-05-27 | Radio Point Sources and the Thermal SZ Power Spectrum | Radio point sources are strongly correlated with clusters of galaxies, so a
significant fraction of the thermal Sunyaev-Zel'dovich (SZ) effect signal could
be affected by point source contamination. Based on empirical estimates of the
radio galaxy population, it is shown that the rms temperature fluctuations of
the the... | 0205467v2 |
2002-07-29 | Measuring Cluster Peculiar Velocities and Temperatures at cm and mm Wavelengths | We present a detailed investigation of issues related to the measurement of
peculiar velocities and temperatures using Sunyaev-Zel'dovich (SZ) effects. We
estimate the accuracy to which peculiar velocities and gas temperatures of
distant galaxy clusters could be measured. With uK sensitivity on arcminute
scales at seve... | 0207600v2 |
2002-07-29 | CMB-Normalized Predictions for Sunyaev-Zel'dovich effect fluctuations | We predict the level of small-scale anisotropy in the cosmic microwave
background (CMB) due to the Sunyaev--Zel'dovich (SZ) effect for the ensemble of
cosmological models that are consistent with current measurements of
large-scale CMB anisotropy. We argue that the recently reported detections of
the small-scale (arcmi... | 0207633v1 |
2002-08-08 | Cosmology with the Sunyaev-Zel'dovich Effect | The Sunyaev-Zel'dovich effect (SZE) provides a unique way to map the
large-scale structure of the universe as traced by massive clusters of
galaxies. As a spectral distortion of the cosmic microwave background, the SZE
is insensitive to the redshift of the galaxy cluster, making it well-suited for
studies of clusters a... | 0208192v1 |
2002-09-25 | External Shear in Quadruply Imaged Lens Systems | We use publicly available N-body simulations and semi-analytic models of
galaxy formation to estimate the levels of external shear due to structure near
the lens in gravitational lens systems. We also describe two selection effects,
specific to four-image systems, that enhance the probability of observing
systems to ha... | 0209532v2 |
2003-05-21 | A Method for Mapping the Temperature Profile of X-ray Clusters Through Radio Observations | Many of the most luminous extragalactic radio sources are located at the
centers of X-ray clusters, and so their radiation must be scattered by the
surrounding hot gas. We show that radio observations of the highly-polarized
scattered radiation (which depends on the electron density distribution) in
combination with th... | 0305417v1 |
2006-09-26 | Reconstructing the Thomson Optical Depth due to Patchy Reionization with 21-cm Fluctuation Maps | Large fluctuations in the electron column density can occur during the
reionization process. We investigate the possibility of deriving the electron
density fluctuations through detailed mapping of the redshifted 21-cm emission
from the neutral medium during reionization. We find that the
electron-scattering optical de... | 0609689v2 |
1998-07-06 | Field Driven Thermostated System : A Non-Linear Multi-Baker Map | In this paper, we discuss a simple model for a field driven, thermostated
random walk that is constructed by a suitable generalization of a multi-baker
map. The map is a usual multi-baker, but perturbed by a thermostated external
field that has many of the properties of the fields used in systems with
Gaussian thermost... | 9807011v2 |
2006-01-19 | Fluctuation theorem for constrained equilibrium systems | We discuss the fluctuation properties of equilibrium chaotic systems with
constraints such as iso-kinetic and Nos\'e-Hoover thermostats. Although the
dynamics of these systems does not typically preserve phase-space volumes, the
average phase-space contraction rate vanishes, so that the stationary states
are smooth. Ne... | 0601435v1 |
2003-06-12 | ATLAS Data Challenge 1 | In 2002 the ATLAS experiment started a series of Data Challenges (DC) of
which the goals are the validation of the Computing Model, of the complete
software suite, of the data model, and to ensure the correctness of the
technical choices to be made. A major feature of the first Data Challenge (DC1)
was the preparation ... | 0306052v1 |
2004-06-21 | Long Nonbinary Codes Exceeding the Gilbert - Varshamov Bound for any Fixed Distance | Let A(q,n,d) denote the maximum size of a q-ary code of length n and distance
d. We study the minimum asymptotic redundancy \rho(q,n,d)=n-log_q A(q,n,d) as n
grows while q and d are fixed. For any d and q<=d-1, long algebraic codes are
designed that improve on the BCH codes and have the lowest asymptotic
redundancy \rh... | 0406039v3 |
2006-08-19 | Algorithmic linear dimension reduction in the l_1 norm for sparse vectors | This paper develops a new method for recovering m-sparse signals that is
simultaneously uniform and quick. We present a reconstruction algorithm whose
run time, O(m log^2(m) log^2(d)), is sublinear in the length d of the signal.
The reconstruction error is within a logarithmic factor (in m) of the optimal
m-term approx... | 0608079v1 |
2007-03-06 | LIBOPT - An environment for testing solvers on heterogeneous collections of problems - Version 1.0 | The Libopt environment is both a methodology and a set of tools that can be
used for testing, comparing, and profiling solvers on problems belonging to
various collections. These collections can be heterogeneous in the sense that
their problems can have common features that differ from one collection to the
other. Libo... | 0703025v1 |
1995-09-19 | Harmonic Maps with Prescribed Singularities on Unbounded Domains | The Einstein/Abelian-Yang-Mills Equations reduce in the stationary and
axially symmetric case to a harmonic map with prescribed singularities
$\p\colon\R^3\sm\Sigma\to\H^{k+1}_\C$ into the $(k+1)$-dimensional complex
hyperbolic space. In this paper, we prove the existence and uniqueness of
harmonic maps with prescribed... | 9509003v1 |
1994-12-12 | N-Black Hole Stationary and Axially Symmetric Solutions of the Einstein-Maxwell Equations | The Einstein/Maxwell equations reduce in the stationary and axially symmetric
case to a harmonic map with prescribed singularities phi: R^3\Sigma -> H^2_C,
where Sigma is a subset of the axis of symmetry, and H^2_C is the complex
hyperbolic plane. Motivated by this problem, we prove the existence and
uniqueness of harm... | 9412036v2 |
1997-11-17 | Novel Electroweak Symmetry Breaking Conditions From Quantum Effects In The MSSM | We present, in the context of the Minimal Supersymmetric Standard Model, a
detailed one-loop analytic study of the minimization conditions of the
effective potential in the Higgs sector.
Special emphasis is put on the role played by $Str M^4$ in the determination
of the electroweak symmetry breaking conditions, where... | 9711356v1 |
1999-01-08 | On the fourth adjoint Contractions of divisorial and fiber types | In this paper, we will list up all the cases for the ray contractions of
divisorial and fiber types for smooth projective varieties of dimension five.
These are obtained as a corollary from the lists of n-dimensional k-th adjoint
contractions f: X -> Y of the same types for k=1,2,3 and 4 (n> or =5). The
lists for k=1,2... | 9901033v2 |
2004-04-19 | Asymptotic Improvement of the Gilbert-Varshamov Bound on the Size of Binary Codes | Given positive integers $n$ and $d$, let $A_2(n,d)$ denote the maximum size
of a binary code of length $n$ and minimum distance $d$. The well-known
Gilbert-Varshamov bound asserts that $A_2(n,d) \geq 2^n/V(n,d-1)$, where
$V(n,d) = \sum_{i=0}^{d} {n \choose i}$ is the volume of a Hamming sphere of
radius $d$. We show th... | 0404325v1 |
2005-11-03 | On the automorphism group of generalized Baumslag-Solitar groups | A generalized Baumslag-Solitar group (GBS group) is a finitely generated
group $G$ which acts on a tree with all edge and vertex stabilizers infinite
cyclic. We show that Out(G) either contains non-abelian free groups or is
virtually nilpotent of class at most 2. It has torsion only at finitely many
primes.
One may d... | 0511083v1 |
2001-07-08 | Statistically Preserved Structures in Shell Models of Passive Scalar Advection | It was conjectured recently that Statiscally Preserved Structures underlie
the statistical physics of turbulent transport processes. We analyze here in
detail the time-dependent (non compact) linear operator that governs the
dynamics of correlation functions in the case of shell models of passive scalar
advection. The ... | 0107016v1 |
2001-11-13 | Statistically Preserved Structures and Anomalous Scaling in Turbulent Active Scalar Advection | The anomalous scaling of correlation functions in the turbulent statistics of
active scalars (like temperature in turbulent convection) is understood in
terms of an auxiliary passive scalar which is advected by the same turbulent
velocity field. While the odd-order correlation functions of the active and
passive fields... | 0111030v1 |
2003-03-27 | On the parametric dependences of a class of non-linear singular maps | We discuss a two-parameter family of maps that generalize piecewise linear,
expanding maps of the circle. One parameter measures the effect of a
non-linearity which bends the branches of the linear map. The second parameter
rotates points by a fixed angle. For small values of the nonlinearity
parameter, we compute the ... | 0303062v1 |
2001-06-06 | The Secrecy Capacity of Practical Quantum Cryptography | Quantum cryptography has attracted much recent attention due to its potential
for providing secret communications that cannot be decrypted by any amount of
computational effort. This is the first analysis of the secrecy of a practical
implementation of the BB84 protocol that simultaneously takes into account and
presen... | 0106033v1 |
2005-11-17 | Quantum Computer Condition: Stability, Classical Computation and Norms | The Quantum Computer Condition (QCC) provides a rigorous and completely
general framework for carrying out analyses of questions pertaining to
fault-tolerance in quantum computers. In this paper we apply the QCC to the
problem of fluctuations and systematic errors in the values of characteristic
parameters in realistic... | 0511177v1 |
2006-12-19 | On the use of photonic N00N states for practical quantum interferometry | The performance of photonic $N00N$ states, propagating in an attenuating
medium, is analyzed with respect to phase estimation. It is shown that, for
$N00N$ states propagating through a lossy medium, the Heisenberg limit is never
achieved. It is also shown that, for a given value of $N$, a signal comprised
of an attenua... | 0612156v1 |
2007-05-22 | Analysis of evidence of Mars life | Gillevinia straata, the scientific name [1, 2] recognizing the first
extraterrestrial living form ever nomenclated, as well as the existence of a
new biological kingdom, Jakobia, in a new biosphere -Marciana- of what now has
become the living system Solaria, is grounded on old evidence reinterpreted in
the light of new... | 0705.3176v3 |
2007-06-26 | Feedback in the Antennae Galaxies (NGC 4038/9): I. High-Resolution Infrared Spectroscopy of Winds from Super Star Clusters | We present high-resolution (R ~ 24,600) near-IR spectroscopy of the youngest
super star clusters (SSCs) in the prototypical starburst merger, the Antennae
Galaxies. These SSCs are young (3-7 Myr old) and massive (10^5 - 10^7 M_sun for
a Kroupa IMF) and their spectra are characterized by broad, extended Br-gamma
emissio... | 0706.3935v1 |
2007-06-29 | Reliable Final Computational Results from Faulty Quantum Computation | In this paper we extend both standard fault tolerance theory and Kitaev's
model for quantum computation, combining them so as to yield quantitative
results that reveal the interplay between the two. Our analysis establishes a
methodology that allows us to quantitatively determine design parameters for a
quantum compute... | 0707.0008v1 |
2007-08-24 | Quantum Sensor Miniaturization | The classical bound on image resolution defined by the Rayleigh limit can be
beaten by exploiting the properties of quantum mechanical entanglement. If
entangled photons are used as signal states, the best possible resolution is
instead given by the Heisenberg limit, an improvement proportional to the
number of entangl... | 0708.3403v1 |
2007-09-02 | A Universal Operator Theoretic Framework for Quantum Fault Tolerance | In this paper we introduce a universal operator theoretic framework for
quantum fault tolerance. This incorporates a top-down approach that implements
a system-level criterion based on specification of the full system dynamics,
applied at every level of error correction concatenation. This leads to more
accurate determ... | 0709.0128v3 |
2007-10-25 | Ordering in red abalone nacre | Red abalone nacre is an intensely studied biomineral, and yet its formation
mechanism remains poorly understood. Here we report quantitative measurements
probing the degree of order of the aragonite tablets in nacre, and show that
order develops over a distance of about 50 microns. These observations indicate
that the ... | 0710.4573v1 |
2007-11-01 | Interaction effects in mixed-valent Kondo insulators | We study theoretically the class of mixed-valent Kondo insulators, employing
a recently developed local moment approach to heavy Fermion systems using the
asymmetric periodic Anderson model (PAM). Novel features in spectra and
transport, observable experimentally but lying outside the scope of the
symmetric PAM or the ... | 0711.0121v1 |
2008-01-31 | Counting growth types of automorphisms of free groups | Given an automorphism of a free group $F_n$, we consider the following
invariants: $e$ is the number of exponential strata (an upper bound for the
number of different exponential growth rates of conjugacy classes); $d$ is the
maximal degree of polynomial growth of conjugacy classes; $R$ is the rank of
the fixed subgrou... | 0801.4844v2 |
2008-04-29 | Combining geometry and combinatorics: A unified approach to sparse signal recovery | There are two main algorithmic approaches to sparse signal recovery:
geometric and combinatorial. The geometric approach starts with a geometric
constraint on the measurement matrix and then uses linear programming to decode
information about the signal from its measurements. The combinatorial approach
constructs the m... | 0804.4666v1 |
2008-08-08 | Heat conductivity from molecular chaos hypothesis in locally confined billiard systems | We study the transport properties of a large class of locally confined
Hamiltonian systems, in which neighboring particles interact through hard core
elastic collisions. When these collisions become rare and the systems large, we
derive a Boltzmann-like equation for the evolution of the probability
densities. We solve ... | 0808.1179v2 |
2008-09-23 | On the derivation of Fourier's law in stochastic energy exchange systems | We present a detailed derivation of Fourier's law in a class of stochastic
energy exchange systems that naturally characterize two-dimensional mechanical
systems of locally confined particles in interaction. The stochastic systems
consist of an array of energy variables which can be partially exchanged among
nearest ne... | 0809.3967v2 |
2008-10-19 | Coding Theorems for Repeat Multiple Accumulate Codes | In this paper the ensemble of codes formed by a serial concatenation of a
repetition code with multiple accumulators connected through random
interleavers is considered. Based on finite length weight enumerators for these
codes, asymptotic expressions for the minimum distance and an arbitrary number
of accumulators lar... | 0810.3422v1 |
2008-12-09 | Statistical properties of time-reversible triangular maps of the square | Time reversal symmetric triangular maps of the unit square are introduced
with the property that the time evolution of one of their two variables is
determined by a piecewise expanding map of the unit interval. We study their
statistical properties and establish the conditions under which their
equilibrium measures hav... | 0812.1648v1 |
2009-03-20 | Fractality of the non-equilibrium stationary states of open volume-preserving systems: I. Tagged particle diffusion | Deterministic diffusive systems such as the periodic Lorentz gas, multi-baker
map, as well as spatially periodic systems of interacting particles, have
non-equilibrium stationary states with fractal properties when put in contact
with particle reservoirs at their boundaries. We study the macroscopic limits
of these sys... | 0903.3476v1 |
2009-03-20 | Fractality of the non-equilibrium stationary states of open volume-preserving systems: II. Galton boards | Galton boards are models of deterministic diffusion in a uniform external
field, akin to driven periodic Lorentz gases, here considered in the absence of
dissipation mechanism. Assuming a cylindrical geometry with axis along the
direction of the external field, the two-dimensional board becomes a model for
one-dimensio... | 0903.3849v1 |
2009-07-23 | On Possible Variation in the Cosmological Baryon Fraction | The fraction of matter that is in the form of baryons or dark matter could
have spatial fluctuations in the form of baryon-dark matter isocurvature
fluctuations. We use big bang nucleosynthesis calculations compared with
observed light element abundances as well as galaxy cluster gas fractions to
constrain cosmological... | 0907.3919v2 |
2009-08-28 | Chaos in cylindrical stadium billiards via a generic nonlinear mechanism | We describe conditions under which higher-dimensional billiard models in
bounded, convex regions are fully chaotic, generalizing the Bunimovich stadium
to dimensions above two. An example is a three-dimensional stadium bounded by a
cylinder and several planes; the combination of these elements may give rise to
defocusi... | 0908.4243v2 |
2009-09-23 | The Gilbert Arborescence Problem | We investigate the problem of designing a minimum cost flow network
interconnecting n sources and a single sink, each with known locations in a
normed space and with associated flow demands. The network may contain any
finite number of additional unprescribed nodes from the space; these are known
as the Steiner points.... | 0909.4270v2 |
2010-08-12 | Magnetization dynamics in the inertial regime: nutation predicted at short time scales | The dynamical equation of the magnetization has been reconsidered with
enlarging the phase space of the ferromagnetic degrees of freedom to the
angular momentum. The generalized Landau-Lifshitz-Gilbert equation that
includes inertial terms, and the corresponding Fokker-Planck equation, are then
derived in the framework... | 1008.2177v1 |
2010-11-03 | Existence of vertical spin stiffness in Landau-Lifshitz-Gilbert equation in ferromagnetic semiconductors | We calculate the magnetization torque due to the spin polarization of the
itinerant electrons by deriving the kinetic spin Bloch equations based on the
$s$-$d$ model. We find that the first-order gradient of the magnetization
inhomogeneity gives rise to the current-induced torques, which are consistent
to the previous ... | 1011.0871v1 |
2011-01-05 | The Fascinating World of Landau-Lifshitz-Gilbert Equation: An Overview | The Landau-Lifshitz-Gilbert (LLG) equation is a fascinating nonlinear
evolution equation both from mathematical and physical points of view. It is
related to the dynamics of several important physical systems such as
ferromagnets, vortex filaments, moving space curves, etc. and has intimate
connections with many of the... | 1101.1005v1 |
2011-02-05 | Graph Theory | This is a replacement paper. There are 6 chapters. The first two chapters are
introductory. The third chapter is on extremal graph theory. The fourth chapter
is about algebra in graph theory. The fifth chapter is focused on algorithms.
The third section of the fifth chapter deals with computable time. The sixth
chapter... | 1102.1087v11 |
2011-04-28 | The High-Redshift Neutral Hydrogen Signature of an Anisotropic Matter Power Spectrum | An anisotropic power spectrum will have a clear signature in the 21cm
radiation from high-redshift hydrogen. We calculate the expected power spectrum
of the intensity fluctuations in neutral hydrogen from before the epoch of
reionization, and predict the accuracy to which future experiments could
constrain a quadrupole... | 1104.5403v3 |
2011-06-30 | A generalisation of the Gilbert-Varshamov bound and its asymptotic evaluation | The Gilbert-Varshamov (GV) lower bound on the maximum cardinality of a q-ary
code of length n with minimum Hamming distance at least d can be obtained by
application of Turan's theorem to the graph with vertex set {0,1,..,q-1}^n in
which two vertices are joined if and only if their Hamming distance is at least
d. We ge... | 1106.6206v1 |
2011-07-17 | Probabilistic Methods on Erdos Problems | The paper reviews and tries to describe the reference set method, which is a
method of combinatorial optimization that gives upper bounds on parameters. | 1107.3279v17 |
2011-09-12 | Externally-driven transmission and collisions of domain walls in ferromagnetic wires | Analytical multi-domain solutions to the dynamical (Landau-Lifshitz-Gilbert)
equation of a one-dimensional ferromagnet including an external magnetic field
and spin-polarized electric current are found using the Hirota bilinearization
method. A standard approach to solve the Landau-Lifshitz equation (without the
Gilber... | 1109.2465v1 |
2011-10-19 | Current-induced switching in transport through anisotropic magnetic molecules | Anisotropic single-molecule magnets may be thought of as molecular switches,
with possible applications to molecular spintronics. In this paper, we consider
current-induced switching in single-molecule junctions containing an
anisotropic magnetic molecule. We assume that the carriers interact with the
magnetic molecule... | 1110.4270v2 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.